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Exchange-Coupling-Induced Symmetry Breaking in Topological Insulators

Author(s)
Wei, Peng; Katmis, Ferhat; Assaf, Badih A.; Steinberg, Hadar; Jarillo-Herrero, Pablo; Heiman, D.; Moodera, Jagadeesh; ... Show more Show less
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Abstract
An exchange gap in the Dirac surface states of a topological insulator (TI) is necessary for observing the predicted unique features such as the topological magnetoelectric effect as well as to confine Majorana fermions. We experimentally demonstrate proximity-induced ferromagnetism in a TI, combining a ferromagnetic insulator EuS layer with Bi2Se3, without introducing defects. By magnetic and magnetotransport studies, including anomalous Hall effect and magnetoresistance measurements, we show the emergence of a ferromagnetic phase in TI, a step forward in unveiling their exotic properties.
Date issued
2013-04
URI
http://hdl.handle.net/1721.1/81329
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Plasma Science and Fusion Center
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Wei, Peng, Ferhat Katmis, Badih A. Assaf, Hadar Steinberg, Pablo Jarillo-Herrero, Donald Heiman, and Jagadeesh S. Moodera. Exchange-Coupling-Induced Symmetry Breaking in Topological Insulators. Physical Review Letters 110, no. 18 (April 2013). © 2013 American Physical Society.
Version: Final published version
ISSN
0031-9007
1079-7114

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